Improved adjustable seat



ADJUSTABLE SEAT.

No. 74,993. Patented Mar. 3, 1868.

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ISAAC COOK, OF ST LOUIS, 'MISSOUBI, ASSIGNOR TO HIMSELF AND FRANKLIN MANU- FACTURING COMPANY, ASSIGNORS TO ISAAC 000K AND GEORGE P. HERTHEL, JR...-

Letters Patent'No. 74,993, dated M'arch 3, $68.

IMPROVED ADJUSTABLE SEAT.-

TO ALL WHOM IT. MAY CONCERN:

Be it known that I, ISAAU COOK, of the city and county of St. Louis, in the State of Missouri, have invented a new and useful Improved Adjustable Scat, of which the following is a full, clear, und exact description, reference being had to the accompanying drawing, making a part of this specification, in which-- Figure 1 represents a. sectional elevation of a school-desk euibodyin'g my improvements, and

Figure 2 represents a longitudinal section "of my trunnions, hereinafter described.

Similar letters indicate like parts.

My invention consists oi a seat, A, resting upon two lovers B, which are attached by'trunnions m to the standards C, forming a part of the side-frame D, in such a manner that the levers swingingupon the truauions may be turned up and back until the seat assumes a perpendicular position. To prevent tlre seat from turning in the other direction,.and to keep it in position when in uetual use, the shorter arms of the levers project until they strikeagaiust the shoulders E, in the side-frnme D. To prevent any noise from the striking of the levernrms against the shoulders, and also to lessen the rigidity of the seat when in actual use, by giving it :1. hide- .spring, a piece of rnhher or other elastic substance, n, is set in or attached to the'shonlder at the point where the lever-arms strike-the same. And still further to insure the noiseless working of the seat, the trunnion will, in manufacture, be made tapering, and will he hushed" with i'uhber', leather,-or their equivalents, as is clearly shown in fig. 2, which presents an eularged sectional view ofthe trunnion and its bushing." In addition to 7 this, there will he placed at F a stud, faced with rubber or its equiralent, so that the shorter arms of the lovers will, when the seat is turned up, strike against the studs, and thereby prerentlthcwood of the seat from striking against the back.

From this it will be seen that whether the seat 5e thrown violently backyor allowed to fall with full force back into position, in neither case is there any noise produced, since c\'ery point of contact is guarded by a.-

substance which deadens the sound.

This seat is intended to he used in all kinds of public buildings, well as schools, and its great superiority over all other adjustable seats is the uoiselessness of its movements, for, by its peculiar construction, hundreds of them may be in lllOlIlOfl'illi the same time with no perceptible noise. The advantage of this, in a crowded lecture-room or in a school irmrse, where perfect quiet is most desirable. (fun be readily appreciated' I I do not claim to be the original in'vntor of adjustable scnls swinging upon pivots or trunnions, so as to be turned hack-against the seat-hack, but

What I do claim, and desire to secure hy Letters Patent, is-

The seat-board A, in combination with the lever B, the trunnion m, supportcd in a rubber-hushed mortise of the stand 0, the shoulder- E, its rubber facing, u, and the checkstud F,iwith its rubber facing, all acting to produce a noiselashly-moving sent, substantially asset forth.

ISAAC COOK,

Witnesses:

SAM'L S. Born, HENRY T. CARTER. 

